| 摘要 |
An image reading unit picks up an image to convert the image into an electric signal. An A/D converter converts the electric signal into a digital signal, and an input image memory stores the digital signal. An image reduction processing unit reduces the image data stored in the input image memory. A reduced image memory stores the reduced image. A control point coordinate generating unit reads out the image stored in the reduced image memory to detect distortion. An image converter corrects distortion of the image data loaded from the input image memory on the basis of the information of the detected distortion. The image data whose distortion is corrected is stored in a corrected image memory. The image data whose distortion is corrected and which is stored in the corrected image memory is read out and recorded, so that when an image pickup operation of characters having distortion is to be performed, the distortion is corrected to obtain a flat image, free from distortion, like an image on a flat surface.
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